import com.sun.xml.internal.messaging.saaj.util.ParserPool; //导入依赖的package包/类
@Override
protected ParserPool initialValue() throws Exception {
        Integer poolSize = AccessController.doPrivileged(
                        new PrivilegedAction<Integer>() {
                                @Override
                                public Integer run() {
                                        try {
                                                return Integer.getInteger(
                                                                SAX_PARSER_POOL_SIZE_PROP_NAME,
                                                                DEFAULT_SAX_PARSER_POOL_SIZE);
                                        } catch (SecurityException se) {
                                                return DEFAULT_SAX_PARSER_POOL_SIZE;
                                        }
                                }
                        });
    return new ParserPool(poolSize);
}
 

import com.sun.xml.internal.messaging.saaj.util.ParserPool; //导入依赖的package包/类
@Override
protected ParserPool initialValue() throws Exception {
    return new ParserPool(5);
}